Communication system and method using large intelligent surface

Abstract

A wireless communication method using a large intelligent surface (LIS) is provided. The method includes transmitting preamble signals each with a different transmission time and transmission direction, receiving preamble signals through an LIS through which an incident radio wave is received and reflected and determining a reference angle of incidence for the preamble signals, receiving the preamble signals that are delivered through a multipath from the terminal, transmitting identification information of a preamble signal having the largest reception power among the received preamble signals to the LIS server, and when the preamble signals includes a preamble signal corresponding to the identification information received from the base station, controlling the LIS such that an angle of reflection at which a data service signal transmitted from the base station is reflected by the LIS corresponds to the reference angle of incidence determined for the preamble signal of the identification information.

What is claimed is: 
     
         1 . An electronic device using a large intelligent surface (LIS) comprising;
 one or more processors;   memory storing one or more computer programs; and   circuitry for communication using the LIS, and   wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the electronic device to:
 receive, via the LIS, at least one preamble signal transmitted from a terminal, wherein each of the at least one preamble signal having a different transmission time and transmission direction, 
 determine a reference angle of incidence for each of the at least one preamble signal, 
 receive, from a base station, identification information of a preamble signal having a largest reception power among the at least one received preamble signal, wherein the at least one preamble signal is transmitted by the terminal and received by the base station through a multipath, and 
 based on the at least one preamble signal including one preamble signal corresponding to the identification information received from the base station, control the LIS such that an angle of reflection, at which a data service signal transmitted from the base station is reflected by the LIS, corresponds to the reference angle of incidence determined for the one preamble signal corresponding to the identification information. 
   
     
     
         2 . The electronic device of  claim 1 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to:
 receive the at least one preamble signal transmitted from the terminal using a plurality of LISs each of which a radio wave reception direction is differently set; and   determine the reference angle of incidence for each of the at least one preamble signal based on the radio wave reception direction of each of the plurality of LISs and a reception power of each of the at least one preamble signal.   
     
     
         3 . The electronic device of  claim 2 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to:
 determine a first LIS through which a first preamble signal included in the at least one preamble signal is received with the largest reception power among the plurality of LISs; and   determine an angle of incidence corresponding to the radio wave reception direction of the determined first LIS as the reference angle of incidence of the first preamble signal.   
     
     
         4 . The electronic device of  claim 3 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to:
 tag and store reception power information of each of the plurality of LISs through which the first preamble signal is received; and   delay time information of the first preamble signal, identification information of the first preamble signal, and information on an angle of incidence corresponding to the radio wave reception direction of each LIS.   
     
     
         5 . The electronic device of  claim 2 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to, based on the at least one preamble signal including the one preamble signal corresponding to the identification information received from the base station, control the plurality of LISs such that the angle of reflection at which the data service signal transmitted from the base station is reflected by each of the plurality of LISs corresponds to the reference angle of incidence determined for the one preamble signal corresponding to the identification information. 
     
     
         6 . The electronic device of  claim 5 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to:
 determine a distance between the terminal and each of the plurality of LISs,   determine whether the distance is a close distance that is less than a threshold; and   based on determining that the distance is the close distance that is less than the threshold, correct the angle of reflection at which the data service signal transmitted from the base station is reflected by each of the plurality of LISs.   
     
     
         7 . The electronic device of  claim 6 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to:
 determine the distance based on the largest reception power among reception powers of one or more preamble signals received through the plurality of LISs; and   determine that the distance is a distant distance based on determining that the distance is greater than or equal to the threshold.   
     
     
         8 . The electronic device of  claim 6 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to correct the angle of reflection of each of the plurality of LISs based on a distance between the plurality of LISs and the reference angle of incidence determined for the one preamble signal corresponding to the identification information. 
     
     
         9 . The electronic device of  claim 2 ,
 wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to, receive, in a plurality of directions, the at least one preamble signal transmitted from the terminal that received a synchronization signal reflected by the plurality of LISs in the plurality of directions, and   wherein the synchronization signal is transmitted from the base station.   
     
     
         10 . The electronic device of  claim 9 , wherein the terminal is receiving the synchronization signal reflected by the plurality of LISs in a plurality of directions through beam sweeping. 
     
     
         11 . The electronic device of  claim 2 , wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to, based on a distance between the plurality of LISs and the terminal being a distant distance greater than or equal to a threshold, control an angle of reflection of each of the plurality of LISs to be the same. 
     
     
         12 . The electronic device of  claim 1 ,
 wherein the LIS comprises a plurality of LISs, and   wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, further cause the electronic device to, based on a distance between each of the plurality of LISs and the terminal being a close distance less than a threshold, correct an angle of reflection of each of the plurality of LISs and control a reflected data service signal to be directed toward the terminal.   
     
     
         13 . A method for wireless communication using a large intelligent surface (LIS), the method comprising:
 receiving, via the LIS, at least one preamble signal transmitted from a terminal, wherein each of the at least one preamble signal having a different transmission time and transmission direction;   determining a reference angle of incidence for each of the at least one preamble signal;   receiving, from a base station, identification information of a preamble signal having a largest reception power among the at least one received preamble signal, wherein the at least one preamble signal is transmitted by the terminal and received by the base station through a multipath; and   based on the at least one preamble signal including one preamble signal corresponding to the identification information received from the base station, controlling the LIS such that an angle of reflection, at which a data service signal transmitted from the base station is reflected by the LIS, corresponds to the reference angle of incidence determined for the one preamble signal corresponding to the identification information.   
     
     
         14 . The method of  claim 13 , wherein the receiving of the at least one preamble signal each having the different transmission time and transmission direction from the terminal through the LIS comprises:
 receiving the at least one preamble signal transmitted from the terminal using a plurality of LISs each of which a radio wave reception direction is differently set; and   wherein determining a reference angle of incidence for each of the at least one preamble signal comprises:   determining the reference angle of incidence for each of the at least one preamble signal based on the radio wave reception direction of each of the plurality of LISs and a reception power of each of the at least one preamble signal.   
     
     
         15 . The method of  claim 14 , wherein the determining of the reference angle of incidence for each of the at least one preamble signal based on the radio wave reception direction and the reception power comprises:
 determining a first LIS through which a first preamble signal included in the at least one preamble signal is received with the largest reception power among the plurality of LISs; and   determining an angle of incidence corresponding to the radio wave reception direction of the determined first LIS as the reference angle of incidence of the first preamble signal.   
     
     
         16 . The method of  claim 14 , wherein the controlling of the LIS comprises, based on the at least one preamble signal including the one preamble signal corresponding to the identification information received from the base station, controlling the plurality of LISs such that the angle of reflection at which the data service signal transmitted from the base station is reflected by each of the plurality of LISs corresponds to the reference angle of incidence determined for the one preamble signal corresponding to the identification information. 
     
     
         17 . The method of  claim 16 , wherein the controlling of the plurality of LISs further comprises;
 determining whether a distance is a close distance that is less than a threshold; and   based on determining that the distance is the close distance that is less than the threshold, correcting the angle of reflection at which the data service signal transmitted from the base station is reflected by each of the plurality of LISs.   
     
     
         18 . The method of  claim 17 , wherein the determining of the reference angle of incidence comprises:
 wherein the determining of the distance comprises determining the distance based on the largest reception power among reception powers of one or more preamble signals received through the plurality of LISs, and   wherein the determining whether the distance is the close distance that is less than the threshold comprises determining that the distance is a distant distance based on the determined distance being greater than or equal to the threshold.   
     
     
         19 . The method of  claim 17 , wherein the correcting comprises correcting the angle of reflection of each of the plurality of LISs based on a distance between the plurality of LISs and the reference angle of incidence determined for the one preamble signal corresponding to the identification information. 
     
     
         20 . The method of  claim 14 , further comprising:
 receiving a synchronization signal from the base station;   transmitting the synchronization signal reflected by the plurality of LISs in a plurality of directions to the terminal; and   receiving preamble signals in the plurality of directions from the terminal.